Composite brick.



, 106. COMPOSHIONS,

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UNITED STAT S PATENT OFFICE.

I LAURENCE ELKUS, OF INDIANAPOLIS, INDIANA.

COMPOSITE BRICK.

I Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed May 17,1906. Serial No. 817,820.

-To all whom it may concern: 4

Be it known that I, LAURENCE Euros, of Indianapolis, county of Marion, and State of Indiana, have invented a certain'new and 5' useful Com osite Brick; and I do hereby declare that t e following is afull, clear, and exact description thereof.

The object of this invention is to rovide a new brick for building purposes an one that is stronger, possesses a greater power of resistance to compression, has its particles more tenaciously bound together, and is otherwise better than building-bricks heretofore manufactured.

I 5 The nature of the invention will be understood from the following description and claim. 1 7

This composite brick is composed of about two per cent. of Wfive per cent. of cement en p r cen 0 ydcrgted lime an eig y-three per cent. of san u I do not wish to be limited to these exact pro ortions, as the percentage of each ine ient may be varied within reasonable 2 5 imits.

The brick is formed in the following man; ner: The sand is first dried and screened, the lime is pulverized and hydrated, and the cement and calcined gypsumare also pulverl .per cent.- of calcined ized. Then all of the ingredients are mixed dry, preferably in a revolving cylinder, in substantially the pro ortions indicated. Moisture is then spraye on the dry mixture while it is being further mixed, and it is afterward fed into the molds of a proper brick size and subjected to a ressure of about seventy-five tons to a bric The bricks are then laid upon cars or the like and conveyed into a cylinder or other steam-tight compartment and indurated by steam at high pres- 0 sure, which causes them to solidify and crystallize into exceedingly-hard and durable bricks.

What I claim as my invention, and desire to secure by Letters Patent, is-

A brick composed of substantially two um, five er cent. of cement, ten per cen of hydrate lime, and I eighty-three per cent. of S gn an e like, substantially as set forth. 59

In witness whereof I have hereunto affixed my signature in the presence of the witnesses herein named. l LAURENCE ELKUS. l Witnesses: W. M. GENTLE,

N. .ALLEMONG. 

